TopToolAIBody Fat Calculator
Estimate your body fat percentage using the US Navy tape-measure method — just your height, neck and waist (plus hip for women). See where you fall on the standard fitness ranges instantly, no gym scale needed. A man standing 175cm tall with a 90cm waist and 38cm neck comes out around 19%, in the Fitness range, while the same neck measurement paired with a 105cm waist pushes the estimate up near 28%, into the Obese range — the method was originally developed for US Navy recruitment physicals in the 1980s as a cheap alternative to skinfold calipers.
How to use Body Fat Calculator
Step-by-step guide to the boxes below. Open it only if you need help.
How to use Body Fat Calculator
Step-by-step guide to the boxes below. Open it only if you need help.
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1
Gender Choose one
Pick male or female. The formula and the measurements it needs are different for each.
Choose one: MaleFemale
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2
Height Number
Your height in centimetres.
Example: 170
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3
Neck Number
Wrap a soft tape around your neck just below the Adam's apple. Look straight ahead and do not pull the tape tight. Enter the number in centimetres.
Example: 38
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4
Waist Number
Measure around your waist at belly-button level. Breathe out normally and do not suck your stomach in. Enter it in centimetres.
Example: 85
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5
Hip (women only) Number
Women only: measure around the widest part of your hips. Men can ignore this box.
Example: 95
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6
Press “Calculate”
Click the button under the boxes. If something is missing or not valid, a short message tells you which box to fix.
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7
Read your result
Your estimated body-fat percentage appears with its category and a short tip. Change any box and try again to compare different numbers.
Body Fat Calculator FAQs
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